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SP331 Datasheet Preview

SP331 Datasheet

Programmable RS-232/RS-485 Transceiver

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® SP331
Programmable RS-232/RS-485 Transceiver
s +5V Only Operation
s Software Programmable RS-232 or
RS-485 Selection
s Four RS-232 Transceivers in RS-232
Mode
s Two RS-485 Full-Duplex Transceivers
in RS-485 Mode
s Two RS-232 Transceivers and One
RS-485 Transceiver in Dual Mode
s Self-Testing Loopback Mode
s Full Driver Tri-State (Hi-Z) Control
s Ideal for RS-232 to RS-485 conversion
DESCRIPTION…
The SP331 is a programmable RS-232 and/or RS-485 transceiver IC. The SP331 contains four
drivers and four receivers when selected in RS-232 mode; and two drivers and two receivers
when selected in RS-485 mode. The SP331 also contains a dual mode which has two RS-232
drivers/receivers plus one differential RS-485 driver/receiver.
The RS-232 transceivers can typically operate at 230kbps while adhering to the RS-232
specifications. The RS-485 transceivers can operate up to 10Mbps while adhering to the RS-485
specifications. The SP331 includes a self-test loopback mode where the driver outputs are
internally configured to the receiver inputs. This allows for easy diagnostic serial port testing
without using an external loopback plug. The RS-232 and RS-485 drivers can be disabled
(High-Z output) by controlling a set of four select pins.
TI4 1
SEL_B 2
TX4 3
TX3 4
VCC 5
TX1 6
TX2 7
GND 8
C1+ 9
V+ (VDD) 10
C2+ 11
C1– 12
C2– 13
V– (VSS) 14
28 TI3
27 TI2
26 TI1
25 SEL_C
24 SEL_A
23 SEL_D
22 RX4
21 RX3
20 RX2
19 RX1
18 RI4
17 RI3
16 RI2
15 RI1
SP331DS/13
SP331 RS-232/RS-485 Serial Transceiver
1
© Copyright 2000 Sipex Corporation




Sipex

SP331 Datasheet Preview

SP331 Datasheet

Programmable RS-232/RS-485 Transceiver

No Preview Available !

ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation
of the device at these ratings or any other above those
indicated in the operation sections of the specifications
below is not implied. Exposure to absolute maximum
rating conditions for extended periods of time may
affect reliability.
V ...........................................................................+7V
CC
Storage Temperature..........................-65˚C to +150˚C
Power Dissipation
28-pin Plastic DIP...........................1000mW
28-pin Plastic SOIC.......................1000mW
Package Derating:
28-pin Plastic DIP
øJA....................................................40 °C/W
28-pin Plastic SOIC
øJA....................................................40 °C/W
SPECIFICATIONS
Typically 25°C @ Vcc = +5V unless otherwise noted.
MIN.
LOGIC INPUTS
VIL
VIH
LOGIC OUTPUTS
VOL
VOH
RS-232 DRIVER
DC Characteristics
HIGH Level Output
LOW Level Output
Open Circuit Voltage
Short Circuit Current
Power Off Impedance
2.0
2.4
+5.0
–15.0
–15
300
AC Characteristics
Slew Rate
Transition Time
Maximum Data Rate
Propagation Delay
tPHL
tPLH
RS-232 RECEIVER
DC Characteristics
HIGH Threshold
LOW Threshold
Receiver Open Circuit Bias
Input Impedance
120
0.8
3
AC Characteristics
Maximum Data Rate
Propagation Delay
tPHL
tPLH
RS-485 DRIVER
DC Characteristics
Open Circuit Voltage
Differential Output
120
1.5
TYP.
235
2
2
1.7
1.2
5
235
0.25
0.25
MAX.
0.8
0.4
+15
–5.0
+15
±100
30
1.5
8
8
3.0
+2.0
7
1
1
6.0
5.0
UNITS
Volts
Volts
Volts
Volts
Volts
Volts
Volts
mA
V/µs
µs
kbps
µs
µs
Volts
Volts
Volts
k
kbps
µs
µs
Volts
Volts
CONDITIONS
IOUT= -3.2mA
IOUT= 1.0mA
RL=3k, VIN=0.8V
RL=3k, VIN=2.0V
VOUT = 0V
Vcc = 0V, Vout = ±2.0V
RL=3k, CL= 50pF
VCC = +5.0V, TA @ +25°C
RL=3k, CL=2500pF ;
between ±3V, TA @ +25°C
RL=3k, CL=2500pF
Measured from 1.5V of VIN
to 50% of VOUT; RL=3k
VIN = +15V to –15V
Measured from 50% of VIN
to 1.5V of VOUT.
RL=54, CL=50pF
SP331DS/13
SP331 RS-232/RS-485 Serial Transceiver
2
© Copyright 2000 Sipex Corporation


Part Number SP331
Description Programmable RS-232/RS-485 Transceiver
Maker Sipex
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SP331 Datasheet PDF






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